摘要
为研究曲率半径对高墩大跨径连续刚构桥静力力学性能的影响,以某高墩大跨径预应力混凝土曲线连续刚构桥为研究对象,采用MIDAS/Civil有限元软件建立直线刚构桥和不同曲率半径的曲线刚构桥有限元计算模型,分别对该桥梁施工阶段最大悬臂状态和成桥阶段进行静力力学性能分析,研究桥梁施工阶段最大悬臂状态、成桥阶段的曲率半径对连续刚构桥内力和变形的影响。计算结果表明:主梁根部的最大横向弯矩、最大扭矩,主梁的径向、扭转变形、桥墩横向弯矩、墩顶最大径向变形均随着桥梁曲率半径减小而显著增大,在施工过程中,要加强施工监控,确保桥梁施工质量和施工安全。计算结果可为曲线刚构桥的设计和施工监控提供参考。
To study the curvature radius ＇ s influence on static mechanical behavior of the continuous rigid frame bridge with high pier and long - span, on the background of a curved frame bridge with high pier and long - span, the finite element model was set up and only changed its radius of curvature in the finite element modeling with the finite element software MIDAS/Civil. The static mechanical behavior of bridge was analyzed in the case of the longest cantilever state in the construction stage and the finished bridge state, respectively. The effect of bridge＇s curvature radius on internal force and deformation of continuous rigid frame bridge was investigated under the two states above. The results indicate that the force and deformation of the bridge structure are more unfavor-able with the decrease of bridge＇s curvature radius. Thus, the bridge＇s construction monitoring should be strength-ened during construction so as to ensure the construction quality and safety. The study can provide some sugges-tions for design and construction control of curved frame bridge.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2013年第1期6-10,共5页
Journal of Railway Science and Engineering
基金
郑州大学研究生科学研究项目(11L10902)
关键词
曲线连续刚构桥
静力力学性能
曲率半径
curved frame bridge
static mechanical behavior
curvature radius
